"So my new book I'm writing? I don't want you to read it."
"Because it's about my weight."
"So! Then you'll know how much I used to weigh."
"Um, you told you me how much you weigh."
"But I mean how much I USED to weigh."
"You also told me how much weight you lost."
"Curse you and your excellent math skills!"
Really though. It's going pretty well.